A quick-drying water-based anticorrosive paint and a preparation method thereof

Abstract

The present application relates to the field of paint, and more particularly to a kind of quick-drying water-based anticorrosive paint and preparation method thereof, water-based anticorrosive paint includes the following components according to weight fraction:100 parts water-based epoxy resin emulsion, 18-32 parts filler, 1.2-2.4 parts dispersant, 0.6-1.8 parts leveling agent, 0.5-1.5 parts defoaming agent, 0.2-1 parts anti-flash rust agent, 25-45 parts curing agent and 20-30 parts water.The curing agent prepared in the application not only solves the problem of slow drying speed of water-based epoxy coating on the market at room temperature, but also has better performance in hardness, impact resistance and corrosion resistance.

Description

Technical Field

[0001] The present invention relates to the field of coatings, and in particular to a quick-drying water-based anti-corrosion coating and a preparation method thereof. Background Art

[0002] Petroleum steel pipes primarily include drill pipes, casing pipes, and pumping pipes. Both newly produced and factory-refurbished steel pipes require a hard-coat anti-rust oil coating, also known as an anti-corrosion coating. Currently, solvent-based anti-corrosion paints are commonly used for petroleum steel pipes, but due to environmental concerns, these are gradually being replaced by water-based coatings. In recent years, water-based epoxy coatings have become increasingly popular for petroleum steel pipe coatings due to their low volatile organic compound content, excellent adhesion to steel substrates, and superior corrosion resistance.

[0003] The performance of waterborne epoxy coatings is affected by factors such as temperature, humidity, coating thickness, and the degree of curing reaction during the drying process. After mixing a waterborne epoxy with a curing agent and applying it to a metal surface, under normal drying conditions, it typically reaches surface dryness within 30 minutes. This means that 80%-90% of the water evaporates from the coating, but the remaining 10%-20% evaporates more slowly, requiring up to 24 hours to completely dry. Furthermore, if high humidity or excessively thick coatings are encountered during application, resulting in water retardation, the surface of the coating can dry quickly, but internal moisture evaporation is limited by the surface drying of the coating. This not only significantly prolongs the drying time, but also hinders the formation of a dense coating due to insufficient internal curing, compromising the coating's quality and long-term corrosion protection. Therefore, the need for a waterborne anti-corrosion coating that can dry quickly and efficiently across the entire surface of the coating is crucial for oil steel pipes. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a quick-drying water-based anti-corrosion coating and a preparation method thereof.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] In a first aspect, the present invention provides a quick-drying water-based anti-corrosion coating comprising the following components, calculated in parts by weight:

[0007] 100 parts of water-based epoxy resin emulsion, 18-32 parts of filler, 1.2-2.4 parts of dispersant, 0.6-1.8 parts of leveling agent, 0.5-1.5 parts of defoamer, 0.2-1 parts of anti-flash rust agent, 25-45 parts of curing agent and 20-30 parts of water.

[0008] Preferably, the preparation method of the waterborne epoxy resin emulsion comprises:

[0009] Weigh the emulsifier and epoxy resin and mix them in a reaction container. Heat to 60-80°C, fully disperse them, pour them into a high-speed shearing machine and disperse them at high speed. During this period, distilled water is continuously added dropwise until the solid content of the epoxy resin reaches 45%-55%. Then continue shearing for 20-30 minutes to obtain a water-based epoxy resin emulsion.

[0010] More preferably, the epoxy resin is a bisphenol A epoxy resin, including at least one of E-51, E-41, and E-20.

[0011] More preferably, the emulsifier is a mixture of octylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 1:0.6-1.2, and the amount of the emulsifier added is 5%-15% of the mass of the epoxy resin.

[0012] More preferably, the high-speed shearing speed is 6000-10000 r / min, and the dropping speed of the distilled water is 5-15 g / min.

[0013] Preferably, the filler is at least one of titanium dioxide, talc, mica powder, and zinc phosphate, with a particle size of 10±2 μm. More preferably, the filler is titanium dioxide and mica powder in a mass ratio of 1-5:1.

[0014] Preferably, the leveling agent is at least one of BYK-345, BYK-346, and BYK-349.

[0015] Preferably, the dispersant is at least one of BYK-190, BYK-192, and BYK-194.

[0016] Preferably, the defoaming agent is at least one of AFE-7610, AFE-1247, and AFE-1410.

[0017] Preferably, the flash rust preventer is at least one of ammonium molybdate, sodium molybdate, ammonium benzoate, sodium benzoate, and benzotriazole, more preferably ammonium benzoate.

[0018] Preferably, the preparation method of the curing agent comprises:

[0019] S1. Add anhydrous ethanol to the reaction flask, then add 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole, stir evenly at room temperature, then add the photoinitiator, introduce nitrogen to replace the air, and stir again to obtain a mixed reaction solution;

[0020] S2. Place the reaction bottle under an ultraviolet light source, stir the reaction during the irradiation process, stop stirring after the reaction is completed, remove the light source, and perform rotary evaporation to remove the solvent to obtain a curing agent.

[0021] Preferably, in S1, the mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinylimidazole and anhydrous ethanol is (0.16-0.32) g: (0.1-0.2) g: (10-30) mL.

[0022] Preferably, in S1, the photoinitiator is benzoin dimethyl ether or benzoin diethyl ether, and the added amount is 3.5%-7.5% of the mass of 5-amino-2-mercaptobenzimidazole.

[0023] Preferably, in S2, the power of the ultraviolet light is 80-160W, and the wavelength is 300-400nm.

[0024] Preferably, in S2, the stirring speed of the reaction is 150-350 r / min, and the reaction time is 10-40 min.

[0025] In a second aspect, the present invention provides a method for preparing a quick-drying water-based anti-corrosion coating, comprising the following steps:

[0026] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring thoroughly to obtain component A;

[0027] Step 2: Mix the curing agent and water and stir thoroughly to obtain component B;

[0028] Step 3: gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0029] The beneficial effects of the present invention are:

[0030] 1. The present invention prepares a quick-drying water-based anti-corrosion coating. The coating adopts an epoxy system with excellent anti-corrosion performance and uses water as a dispersion medium instead of traditional organic solvents, which greatly reduces the emission of volatile organic compounds (VOCs) and meets green environmental protection requirements.

[0031] 2. The coating prepared by the present invention uses a homemade curing agent, which is prepared using 5-amino-2-mercaptobenzimidazole and N-vinylimidazole as raw materials through a thiol-double bond click chemistry reaction. The obtained curing agent contains a large amount of amino groups, imidazole groups, benzimidazole groups and thioether groups, which has a good promoting effect on the low-temperature curing of epoxy resin.

[0032] 3. The curing agent prepared by the present invention has strong hydrophilicity and can be directly mixed with water to form a curing agent solution, and then mixed with the resin emulsion; moreover, the curing agent has strong activity and can be cured in a humid or low-temperature environment, without the need for additional accelerators (such as DMP-30), and can achieve rapid drying of water-based coatings.

[0033] 4. The curing agent prepared by the present invention not only solves the problem of slow drying speed of water-based epoxy coatings on the market at room temperature, but also the obtained coating has better performance in hardness, impact resistance and corrosion resistance. DETAILED DESCRIPTION

[0034] The technical solution of the present invention is described below through specific examples. It should be understood that the one or more method steps mentioned in the present invention do not exclude the presence of other method steps before and after the combination step or the insertion of other method steps between these explicitly mentioned steps; it should also be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. Moreover, unless otherwise specified, the numbering of each method step is only a convenient tool for identifying each method step, and is not intended to limit the order of arrangement of each method step or to define the scope of the present invention. Changes or adjustments in their relative relationships, without substantially changing the technical content, should also be regarded as the scope of the present invention.

[0035] In order to better understand the above technical solutions, exemplary embodiments of the present invention are described in more detail below. Although exemplary embodiments of the present invention are shown, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0036] The present invention will be further described below with reference to the following examples.

[0037] Example 1

[0038] A quick-drying water-based anti-corrosion coating, calculated by weight, comprising the following components:

[0039] 100 parts of water-based epoxy resin emulsion, 25 parts of filler, 1.8 parts of dispersant, 1.2 parts of leveling agent, 1 part of defoamer, 0.6 parts of anti-flash rust agent, 35 parts of curing agent and 25 parts of water.

[0040] The preparation method of the waterborne epoxy resin emulsion comprises:

[0041] Octylphenol polyoxyethylene ether and sodium lauryl sulfate are weighed and mixed in a mass ratio of 1:0.8 to obtain an emulsifier. The emulsifier and bisphenol A epoxy resin E-51 are mixed in a reaction container in an amount of 10% of the mass of the epoxy resin. The mixture is heated to 70° C. and fully dispersed. The mixture is then poured into a high-speed shearing machine and dispersed under a high-speed shearing speed of 8000 r / min. During the dispersion, distilled water is continuously added dropwise at a dropping rate of 10 g / min until the solid content of the epoxy resin reaches 50%. The mixture is then sheared for 25 minutes to obtain a water-based epoxy resin emulsion.

[0042] Among them, the filler is titanium dioxide and mica powder in a mass ratio of 3:1, with a particle size of 10±2μm; the leveling agent is BYK-346; the dispersant is BYK-192; the defoaming agent is AFE-7610; and the anti-flash rust agent is ammonium benzoate.

[0043] The preparation method of the curing agent includes:

[0044] S1. Anhydrous ethanol was added to the reaction vessel, and then 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole were added. The mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol was 0.24 g: 0.15 g: 20 mL. The mixture was stirred at room temperature. Then, a photoinitiator, benzoin diethyl ether, was added in an amount of 5.5% of the mass of 5-amino-2-mercaptobenzimidazole. Nitrogen was introduced to replace the air, and the mixture was stirred again to obtain a mixed reaction solution.

[0045] S2. Place the reaction container under an ultraviolet light source with a power of 120W and a wavelength of 365nm. Stir at a speed of 250r / min during the irradiation process. After the reaction is treated for 30 minutes, stop stirring and remove the light source. Rotary evaporate the reaction solution to remove the solvent to obtain a curing agent.

[0046] The preparation method of the above-mentioned quick-drying water-based anti-corrosion coating comprises the following steps:

[0047] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring thoroughly to obtain component A;

[0048] Step 2: Mix the curing agent and water and stir thoroughly to obtain component B;

[0049] Step 3: gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0050] Example 2

[0051] A quick-drying water-based anti-corrosion coating, calculated by weight, comprising the following components:

[0052] 100 parts of water-based epoxy resin emulsion, 18 parts of filler, 1.2 parts of dispersant, 0.6 parts of leveling agent, 0.5 parts of defoamer, 0.2 parts of anti-flash rust agent, 25 parts of curing agent and 20 parts of water.

[0053] The preparation method of the waterborne epoxy resin emulsion comprises:

[0054] Octylphenol polyoxyethylene ether and sodium lauryl sulfate are weighed and mixed in a mass ratio of 1:0.6 to obtain an emulsifier. The emulsifier and bisphenol A epoxy resin E-41 are mixed in a reaction container in an amount of 5% of the mass of the epoxy resin. The mixture is heated to 60° C. and fully dispersed. The mixture is then poured into a high-speed shearing machine and dispersed under a high-speed shearing speed of 6000 r / min. During the dispersion, distilled water is continuously added dropwise at a dropping rate of 5 g / min until the solid content of the epoxy resin reaches 45%. The mixture is then sheared for 20 minutes to obtain a water-based epoxy resin emulsion.

[0055] Among them, the filler is titanium dioxide; the leveling agent is BYK-345; the dispersant is BYK-190; the defoaming agent is AFE-1247; and the anti-flash rust agent is ammonium molybdate.

[0056] The preparation method of the curing agent includes:

[0057] S1. Anhydrous ethanol was added to the reaction vessel, and then 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole were added. The mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol was 0.16 g: 0.1 g: 10 mL. The mixture was stirred at room temperature. Then, a photoinitiator, benzoin dimethyl ether, was added in an amount of 3.5% of the mass of 5-amino-2-mercaptobenzimidazole. Nitrogen was introduced to replace the air, and the mixture was stirred again to obtain a mixed reaction solution.

[0058] S2. Place the reaction container under an ultraviolet light source with a power of 80W and a wavelength of 365nm. Stir at a speed of 150r / min during the irradiation process. After the reaction is treated for 10 minutes, stop stirring and remove the light source. Rotary evaporate the reaction liquid to remove the solvent to obtain a curing agent.

[0059] The preparation method of the above-mentioned quick-drying water-based anti-corrosion coating comprises the following steps:

[0060] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring thoroughly to obtain component A;

[0061] Step 2: Mix the curing agent and water and stir thoroughly to obtain component B;

[0062] Step 3: gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0063] Example 3

[0064] A quick-drying water-based anti-corrosion coating, calculated by weight, comprising the following components:

[0065] 100 parts of water-based epoxy resin emulsion, 32 parts of filler, 2.4 parts of dispersant, 1.8 parts of leveling agent, 1.5 parts of defoamer, 1 part of anti-flash rust agent, 45 parts of curing agent and 30 parts of water.

[0066] The preparation method of the waterborne epoxy resin emulsion comprises:

[0067] Octylphenol polyoxyethylene ether and sodium lauryl sulfate were weighed and mixed in a mass ratio of 1:1.2 to obtain an emulsifier. The emulsifier and epoxy resin E-20 were mixed in a reaction vessel in an amount of 15% of the mass of the epoxy resin. The mixture was heated to 80° C. and fully dispersed. The mixture was then poured into a high-speed shearing machine and dispersed under a high-speed shearing speed of 10,000 r / min. During the dispersion, distilled water was continuously added dropwise at a dropping rate of 15 g / min until the solid content of the epoxy resin reached 55%. The mixture was then sheared for 30 minutes to obtain a water-based epoxy resin emulsion.

[0068] The filler is zinc phosphate with a particle size of 10±2 μm; the leveling agent is BYK-349; the dispersant is BYK-194; the defoaming agent is AFE-1410; and the anti-flash rust agent is benzotriazole.

[0069] The preparation method of the curing agent includes:

[0070] S1. Anhydrous ethanol was added to the reaction vessel, and then 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole were added. The mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol was 0.32 g: 0.2 g: 30 mL. The mixture was stirred at room temperature. Then, a photoinitiator, benzoin dimethyl ether, was added in an amount of 7.5% of the mass of 5-amino-2-mercaptobenzimidazole. Nitrogen was introduced to replace the air, and the mixture was stirred again to obtain a mixed reaction solution.

[0071] S2. Place the reaction container under an ultraviolet light source with a power of 160W and a wavelength of 400nm. Stir at a speed of 350r / min during the irradiation process. After the reaction treatment for 40min, stop stirring and remove the light source. Rotary evaporate the reaction liquid to remove the solvent to obtain a curing agent.

[0072] The preparation method of the above-mentioned quick-drying water-based anti-corrosion coating comprises the following steps:

[0073] Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring thoroughly to obtain component A;

[0074] Step 2: Mix the curing agent and water and stir thoroughly to obtain component B;

[0075] Step 3: gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.

[0076] Example 4

[0077] A quick-drying water-based anti-corrosion coating is provided, which differs from Example 1 only in that the weight proportions of the components are different.

[0078] Calculated by weight, it includes the following components:

[0079] 100 parts of water-based epoxy resin emulsion, 21 parts of filler, 1.6 parts of dispersant, 0.9 parts of leveling agent, 0.8 parts of defoamer, 0.4 parts of anti-flash rust agent, 30 parts of curing agent and 25 parts of water.

[0080] Example 5

[0081] A quick-drying water-based anti-corrosion coating is provided, which differs from Example 1 only in that the weight proportions of the components are different.

[0082] Calculated by weight, it includes the following components:

[0083] 100 parts of water-based epoxy resin emulsion, 28 parts of filler, 2.1 parts of dispersant, 1.2 parts of leveling agent, 1.1 parts of defoamer, 0.7 parts of anti-flash rust agent, 32 parts of curing agent and 25 parts of water.

[0084] Comparative Example 1

[0085] A quick-drying water-based anti-corrosion coating is different from Example 1 only in the composition of the curing agent. In this comparative example, the curing agent is replaced with 5-amino-2-mercaptobenzimidazole.

[0086] Comparative Example 2

[0087] A quick-drying water-based anti-corrosion coating is different from Example 1 only in the composition of the curing agent. In this comparative example, the curing agent is replaced by N-vinyl imidazole.

[0088] Comparative Example 3

[0089] A quick-drying water-based anticorrosive coating differs from Example 1 only in the composition of the curing agent. In this comparative example, the curing agent is replaced with a mixture of 5-amino-2-mercaptobenzimidazole and N-vinylimidazole, with the mass ratio of 5-amino-2-mercaptobenzimidazole to N-vinylimidazole being 0.24:0.15.

[0090] Experimental testing

[0091] The water-based anti-corrosion coatings prepared in Example 1 and Comparative Examples 1-3 were sprayed on different SUS201 stainless steel plates with a spraying thickness of 80±2μm. After spraying, they were cured at room temperature (25°C, 65RH%). The curing time was tested, and then the performance was tested and compared.

[0092] Test method: The test reference standard for surface drying time and through drying time is GB / T 1728-2020; the test reference standard for adhesion is GB / T 9286-2021; the test reference standard for impact resistance is GB / T 1732-2020; the test reference standard for salt spray resistance is GB / T1771-2007; the test reference standard for alkali resistance is GB / T 9274-1988, which is to immerse the thoroughly dried paint in 0.1mol / L NaOH solution for 72 hours, and observe whether there is bubbling, shedding, cracking, powdering, etc. after drying; the acid resistance test also refers to GB / T 9274-1988, except that the thoroughly dried paint is immersed in 0.05mol / L H2SO4 solution for 72 hours, and observe whether there is bubbling, shedding, cracking, powdering, etc. after drying.

[0093] The test results are shown in Table 1:

[0094] Table 1 Performance test results of different water-based anti-corrosion coatings

[0095] Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Surface drying time (h) 0.5-0.6 0.7-0.8 0.8-0.9 0.7-0.8 Drying time (h) 11-12 16-17 23-24 19-20 Adhesion (grade) 1 1 1 1 Impact resistance (cm) 50 45 45 45 Hardness (pencil) 4H 3H 3H 3H Salt spray resistance (h) ＞800 500-600 600-700 550-650 Alkali resistance Basically intact A small amount of foaming A small amount of foaming A small amount of foaming Acid resistance Basically intact Basically intact Basically intact Basically intact

[0096] As can be seen from Table 1, the water-based anti-corrosion coating prepared in Example 1 of the present invention not only has significantly shortened surface drying time and actual drying time compared to Comparative Examples 1-3, but also has better performance in hardness, impact resistance and corrosion resistance.

[0097] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0098] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A quick-drying water-based anti-corrosion coating, characterized in that: Calculated by weight, it includes the following components: 100 parts of waterborne epoxy resin emulsion, 18-32 parts of filler, 1.2-2.4 parts of dispersant, 0.6-1.8 parts of leveling agent, 0.5-1.5 parts of defoamer, 0.2-1 parts of anti-flash rust agent, 25-45 parts of curing agent and 20-30 parts of water; The preparation method of the curing agent comprises: S1. Add anhydrous ethanol to the reaction flask, then add 5-amino-2-mercaptobenzimidazole and N-vinyl imidazole, stir evenly at room temperature, then add the photoinitiator, introduce nitrogen to replace the air, and stir again to obtain a mixed reaction solution; S2. Place the reaction bottle under an ultraviolet light source, stir the reaction during the irradiation process, stop stirring after the reaction is completed, remove the light source, and perform rotary evaporation to remove the solvent to obtain a curing agent.

2. A quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The preparation method of the water-based epoxy resin emulsion comprises: Weigh the emulsifier and epoxy resin and mix them in a reaction container. Heat to 60-80°C, fully disperse them, pour them into a high-speed shearing machine and disperse them at high speed. During this period, distilled water is continuously added dropwise until the solid content of the epoxy resin reaches 45%-55%. Then continue shearing for 20-30 minutes to obtain a water-based epoxy resin emulsion.

3. A quick-drying water-based anti-corrosion coating according to claim 2, characterized in that: The epoxy resin is a bisphenol A epoxy resin, including at least one of E-51, E-41, and E-20; the emulsifier is a mixture of octylphenol polyoxyethylene ether and sodium lauryl sulfate in a mass ratio of 1:0.6-1.2, and the added amount of the emulsifier is 5%-15% of the mass of the epoxy resin.

4. A quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The filler is at least one of titanium dioxide, talc, mica powder, and zinc phosphate, and has a particle size of 10±2 μm.

5. The quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The leveling agent is at least one of BYK-345, BYK-346, and BYK-349; the dispersant is at least one of BYK-190, BYK-192, and BYK-194; and the defoaming agent is at least one of AFE-7610, AFE-1247, and AFE-1410.

6. The quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The flash rust preventer is at least one of ammonium molybdate, sodium molybdate, ammonium benzoate, sodium benzoate, and benzotriazole.

7. The quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: In S1, the mass volume ratio of 5-amino-2-mercaptobenzimidazole, N-vinyl imidazole and anhydrous ethanol is (0.16-0.32) g: (0.1-0.2) g: (10-30) mL; the photoinitiator is benzoin dimethyl ether or benzoin diethyl ether, and the added amount is 3.5%-7.5% of the mass of 5-amino-2-mercaptobenzimidazole.

8. The quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: In the step S2, the power of the ultraviolet light is 80-160 W, and the wavelength is 300-400 nm; the stirring speed of the reaction is 150-350 r / min, and the reaction time is 10-40 min.

9. A method for preparing the quick-drying water-based anti-corrosion coating according to claim 1, characterized in that: The following steps are involved: Step 1, mixing the water-based epoxy resin emulsion, filler, dispersant, leveling agent, defoamer, and anti-flash rust agent weighed according to amount, and stirring thoroughly to obtain component A; Step 2: Mix the curing agent and water and stir thoroughly to obtain component B; Step 3: gradually add component B into component A and stir thoroughly to obtain a quick-drying water-based anti-corrosion coating.